US4929480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent structure for absorbing food product liquids
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1987-07-20
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Granted: 1990-05-29
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Expires: 2007-07-20
Abstract
Abstract An absorbent structure for collecting and retaining exuded fluids from food products such as meat and poultry is disclosed herein. The structure has a fluid permeable top sheet and a fluid impermeable bottom sheet with an absorbent core of pulp coform material located therebetween. In a preferred embodiment the periphery of the top and bottom sheets are sealed to form a pouch and the pulp coform material is stratified into a first top layer and a second bottom layer. Superabsorbents such as carboxymethylcellulose may be added to the coform material to aid in fluid retention. In the preferred embodiment the superabsorbent is located in the bottom layer of pulp coform while the top layer of the pulp coform is substantially devoid of the superabsorbent.
Inventors
- 👤 David G. Midkiff
- 👤 Carl G. Rippl
- 👤 Nancy D. Twyman
- 👤 Joseph D. Wahlquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:02
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/264; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1348; Y10T428/1352; Y10T428/1362; Y10T428/1366; Y10T428/23; Y10T428/237
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
An absorbent structure for collecting and retaining fluids released from foods comprising: a fluid permeable top sheet, a fluid impermeable bottom sheet, and an absorbent inner core of pulp conform material positioned between and joined to said top and bottom sheets, said absorbent inner core containing between 50 and 90 percent by weight wood pulp fluff and between 10 and 50 percent by weight synthetic fibers based upon the combined weight of said wood pulp fluff and said synthetic fibers, said absorbent inner core being divided into a first layer adjacent said top sheet and a second layer adjacent said bottom sheet, said second layer having a higher synthetic fiber concentration than said first layer, said first layer being substantially devoid of a superabsorbent material and said second layer containing a superabsorbent material in a weight percent add on from 5 to 100 percent based upon the combined weight of said wood pulp fluff and said synthetic fibers in said second layer.
Claim 2
Dependent Claim
162 words
An absorbent structure for collecting and retaining fluids released from foods comprising: a fluid permeable top sheet, a fluid impermeable bottom sheet, and an absorbent inner core of pulp conform material positioned between and joined to said top and bottom sheets, said absorbent inner core containing between 50 and 90 percent by weight wood pulp fluff and between 10 and 50 percent by weight synthetic fibers based upon the combined weight of said wood pulp fluff and said synthetic fibers, said absorbent inner core being divided into a first layer adjacent said top sheet and a second layer adjacent said bottom sheet, said second layer having a higher synthetic fiber concentration than said first layer, said first layer being substantially devoid of a superabsorbent material and said second layer containing a superabsorbent material in a weight percent add on from 5 to 100 percent based upon the combined weight of said wood pulp fluff and said synthetic fibers in said second layer.
Claim 3
Dependent Claim
12 words
The absorbent structure of claim 1 wherein said superabsorbent material is carboxymethylcellulose.
Claim 4
Dependent Claim
172 words
An absorbent structure for collecting and retaining fluids released from foods comprising: a fluid collection pouch having a fluid permeable top sheet and a fluid impermeable bottom sheet joined by a sealed periphery and defining a chamber therein, and an absorbent inner core of pulp coform material within said chamber containing 50 to 90 percent by weight wood pulp fluff and 10 to 50 percent by weight synthetic fibers based upon the combined weight of said wood pulp fluff and said synthetic fibers, said absorbent inner core being divided into a first layer adjacent said top sheet of said pouch and a second layer adjacent said bottom sheet of said pouch, said second layer having a higher synthetic fiber concentration than said first layer, said first layer being substantially devoid of a superabsorbent material and said second layer containing a superabsorbent material in a weight percent add on of from 5 to 100 percent based upon the combined weight of said wood pulp fluff and said synthetic fibers in said second layer.
Claim 5
Dependent Claim
172 words
An absorbent structure for collecting and retaining fluids released from foods comprising: a fluid collection pouch having a fluid permeable top sheet and a fluid impermeable bottom sheet joined by a sealed periphery and defining a chamber therein, and an absorbent inner core of pulp coform material within said chamber containing 50 to 90 percent by weight wood pulp fluff and 10 to 50 percent by weight synthetic fibers based upon the combined weight of said wood pulp fluff and said synthetic fibers, said absorbent inner core being divided into a first layer adjacent said top sheet of said pouch and a second layer adjacent said bottom sheet of said pouch, said second layer having a higher synthetic fiber concentration than said first layer, said first layer being substantially devoid of a superabsorbent material and said second layer containing a superabsorbent material in a weight percent add on of from 5 to 100 percent based upon the combined weight of said wood pulp fluff and said synthetic fibers in said second layer.
Claim 6
Dependent Claim
15 words
The absorbent structure of claim 3 wherein said superabsorbent in said second layer is carboxymethylcellulose.
Claim 7
Dependent Claim
36 words
The absorbent structure of claim 3 wherein said fluid collection pouch and said absorbent inner core define a fluid reservoir area between said absorbent inner core and said sealed periphery for additional storage of said fluids.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |